Improvement in hub-boring- machine



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"Musen/I i r. JONAS, or FREEPO'RT, iLLINoIs.

. Latas` Param No. 87,852, aan Mwah 1c, ieee.

IMPROVEMENT IN HUB-BORING- MACHINE.

The Schedule referred to in these Letters Patent and making part of the Anne.

To all whom it may concern.-

' Be it known that I, Ff J oNAs, of Freeport, in the county of Stephenson, and State of Illinois, have invented a new and useful Improvement in Apparatus for Boring Hubs; and Ido hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specication.

This invention relates to a useful improvement in apparatus forbornghubs of carriage and wagon-wheels, and for other purposes of a similar nature; and Y The'invention consists in the construction of the sleeve and mandrel for adjusting the cutter, and also in thc combination of the same with the adjustable frames for setting the hub.

l Figure l represents an end view of the apparatus.

Figure 2 is a vertical section of iig. l, through the line :t x.

Similar letters of 'reference indicate corresponding parts.

A is the cutting-mandrel, or auger, which is supported by the tube or sleeve B.

C is the cutter,- wbieh passes through the collar d, and is fastened rigidly in place by the screw-lever c, on the mandrel, as seen in the drawing.

This lever, when screwed up against the washer f, draws the cutter against the ends of the sleeve.

' The cutter is also held and prevented from .slipping in the collar d, by the small cogs on its side, which enter a groove in the end of the sleeve.

There are a number of these cogs, which allow of the adjustment of the cutter toward or from the centre, as may be desired.

. g is a guide, which is adjusted in the same manner, placed between the washer f and the collar h, at the other'end of the sleeve.

. The boring-mandrel A, with the sleeve B, is guided in its position by plates J J, which slide in frames K K, at each end of the hub.

These frames are made in two parts each.

One part, marked L, slides in the other on ways, and each part is provided with projecting dogs m, which, when the apparatus is attached tothe hub, en'- close th hub at both ends, as seen in red color in the diawing, iig. 1. Y

The' frames are fastened to the hub by the screws N.

These screws are provided each with both a right and a left-hand threaded screw.

The right-hand thread engages with acorresponding screw-thread in the main part of the frame K, and the left-hand thread engages with a corresponding thread i'n the sliding part L, so that when the screw is turned one wa the dogs m are brought toward each other, and thereby fasten the frames firmly to the' ends of the hub.

The plates J slide on the faces of the frames K, being conned thereto by hooks o, which allow them a free movement up and'down.

These plates J are connected with the screws N by means of ears p, projectingon their inner sides, which ears are confined tc the screw between two fast collars q q, as seen in the drawing.

The position of the boring-mandrel (with the sleeve) is governed by these fastening-screws N.

It will be seen that as the screws are turned in the frames K, the plates J willpbe carried up or down, as required.

R represents a guide-box, formed of two jaws, which are pivoted to the plate J, for holding the sleeve and mandrel in position. f

These' jaws are held together, at the ends opposite the pivots, by aclasp or band.

The mandrel is revolved by the lever-handle S, and thecutte isfed through the hub by means of the screwthread T on the mandrel, which works in a jaw-nut, u,

attached to the plate J, constructed in the same manner as the box R, already described.

u represents the clasps, or bands, on the box, and on the nut u. I

By slippingk the clasp (or bands) off the jaws, the jaws open, and the mandrel and sleeve may be removed.

I claim as new, and desire to secure by Letters Patentl 1. The mandrel A and sleeve B, with the adjustable cutter C, constructed, arranged, and operating substantially as specied.

2. In combination with the` mandrel A, sleeve B, and cutter 0,-the frame K, and the yadj ustable plates J and L, arranged as described, for the purpose speci'- iied. z

`Vlfitnesses: F. JONAS.

T. F. Goonnnn, L. A. BABoocK. 

